Find the must places to see in Porto

Port wine (also known as vinho do Porto, Portuguese pronunciation: [ˌviɲuduˈpoɾtu], Porto, and usually simply port) is a Portuguese fortified wine produced with distilled grape spirits exclusively in the Douro Valley in the northern provinces of Portugal. It's 13:05 right now , with clear sky and the temperature of 27.08°C (80.744°F) in Porto.